http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59469
--- Comment #7 from Markus Trippelsdorf <octoploid at yandex dot com> --- (In reply to Jan Hubicka from comment #6) > With -fno-fat-lto-objects we are also faster on SPEC build time and I think > it should be the case in general. We produce considerably less code and > most of time is spent in the backend. For super large projects with > parallel makefiles the time spent in serial WPA may overweight the benefits, > but for GCC and firefox I believe the only problem is that it builds > multiple binaries from same static libraries. Here we end up optimizing the > static libraries many times, while in traditional build we optimize just > once. Naive question: Why not use dynamic libraries in the case of gcc? > Let me see if I can reproduce the weak symbol. In these cases my life would > be a lot easier if you attached the resolution file and told me the > unmangled name of the symbol. But thanks a lot for the analysis and LTO > testing! It is badly needed. sorry: _ZN4llvm21SymbolTableListTraitsINS_10BasicBlockENS_8FunctionEE21transferNodesFromListERNS_12ilist_traitsIS1_EENS_14ilist_iteratorIS1_EES8_ % cat BasicBlock.res 2 BasicBlock.o 9 234 e1ebf4c224baf514 PREVAILING_DEF_IRONLY_EXP _ZN4llvm21SymbolTableListTraitsINS_10BasicBlockENS_8FunctionEE21transferNodesFromListERNS_12ilist_traitsIS1_EENS_14ilist_iteratorIS1_EES8_ 239 e1ebf4c224baf514 PREVAILING_DEF_IRONLY_EXP _ZN4llvm10BasicBlock10moveBeforeEv 290 e1ebf4c224baf514 PREVAILING_DEF_IRONLY_EXP c 247 e1ebf4c224baf514 UNDEF _ZN4llvm14ilist_iteratorINS_10BasicBlockEEneERS2_ 252 e1ebf4c224baf514 UNDEF _ZN4llvm14ilist_iteratorINS_10BasicBlockEEppEv 257 e1ebf4c224baf514 UNDEF _ZN4llvm12ilist_traitsINS_10BasicBlockEE9getSymTabEPNS_8FunctionE 262 e1ebf4c224baf514 UNDEF _ZN4llvm21SymbolTableListTraitsINS_10BasicBlockENS_8FunctionEE12getListOwnerEv 283 e1ebf4c224baf514 UNDEF _ZN4llvm8Function17getBasicBlockListEv 288 e1ebf4c224baf514 UNDEF _ZN4llvm10BasicBlock9getParentEv Function.o 1 214 bf4c643d7570440b PREEMPTED_IR _ZN4llvm21SymbolTableListTraitsINS_10BasicBlockENS_8FunctionEE21transferNodesFromListERNS_12ilist_traitsIS1_EENS_14ilist_iteratorIS1_EES8_
